This morning I come into the living room to find all the cats huddling around something on the floor.  I assume it is a spider and look to confirm and it is one of the ants!  The industrious little guys had built a hill over their water dish and climbed out the watering hole!  There were two, one I was able to save and put back into the habitat using tweezers.  The other?  Murderous cats!  This was a group effort; they swatted it to death.  We had to plunge pencils into the watering holes to secure the ants and move the water dish.  They are trying to use their mighty ant powers to remove the pencils, so we check them regularly.